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Beef is an important food ingredient in meeting nutritional needs. Protein in beef is easier to digest than protein from plants (vegetables). Papaya leaf is a medicinal plant because it contains alkaloids and proteolytic enzymes, papain, khimopapain, and lyosomes, which are useful in the digestive process and facilitate the work of the intestines. Papaya contains protease enzymes (protein decomposers), papain and khimopapain. Both of these enzymes have the ability to decompose the bonds in the protein molecule so that the protein breaks down into polypeptides and dipeptides. Based on the research done in getting the following results in each sample, samples marinated with papaya leaf for 10 minutes have 11 protein bands, samples marinated during 20 minutes have 16 protein bands and samples marinated for 30 minutes have 15 protein bands.